Cellulose-ester composition



. preferable, in that requiring anearly non-volatile solvent. 15

Patented 28,1926.

UNITED STATES PATENT OFFICE.

nouns-r a. 'vusczuacx; 33.,0! nvnnsro'x, rnmncrs Io Drawing.

My invention to a new and useful composition comprising a celluloseester and an ester contaimng benzyl or an allied radical. An example is a composition com- 6 prising nitrocellulose and benzyl lactate.

Other purposes of the invention will appearfrom the following description;

' Benzyl acetate and ben'zyl benzoate have already been disclosed as ientsof cel- 10 lulow'ester compositions.- uch compounds of the benzyl radical are less volatile than the corresponding ethyl compounds and are for those uses have now discovered that I can produce nitrocellulose or cellulom acetate com itions with benzyl lactate or other ed esters of hydroxy aliphatic acids. Such anester dissolves the usual grades of nitro-' 20 cellulose or cellulose acetate. Also benzyl lacetate, containing an hydroxyl group, has certain properties of an alcohol. Benzyl lactate is, therefore, an excellent blending agent for cellulose esters and certain al- 95 ,cohol-soluble vents which are readily volatilized from the lacquer film may be varied over wide ranges.

' Likewise, the proportion of .benzyl lactate itself ma be varied to produce lac uers.

suitable: or use under diverse atmosp eric conditions, lacquers giving residual films of greater or les softness, or lacquers to :meet

other special requirements. v

My composition may be used also in the manufacture of celluloid. While the method of preparing .benayl lactate is disclaimed as no part of mymvention, et the method may be of interest. Benzyl c oride is refluxed with an aqueous or alcoholic solution of sodium lactate. The

- chlorbenzyl lactate,"

common.

A uu'mh ma :1. 1m. n. 51.0. Y

resulting. benzyl lactate is purified by any one of several p ures.

7 As stated, my invention includes notonly nitrocellulosev but also cellulose acetate compositions with benz'yl. lactate. Also, my invention includes compodtions of such cellulosic compounds with the substitution products, homologs, or isomers of benzyl lactate or with the corresponding esters of any other mono-,'di-, or tri-hydroxy aliphatic acid. Classes of compounds within the aliphatic acid, such as V I 4 C,IL.OO C.'CH(0H).0 H(OH).GOOO,H,,

benzyl'tartr'ate. v l ester of a-hydroxy trictrboxylic aliphatic acid, such as ofi..ooc.cssc(om. coo.cim.csscoo.e.m,

;benzyl citrate.

'Substituteribenzyl, esters of hydroxy aliinono-, di-, or ,tri-carboxylic,

phatic acids, such as I 'CH.-0H(0H),-Q00-(C1LGE), methy1.benzy1.la ctate.

cmm mow efia,

Isomers of benz'yl eeters suchas ne s v V in which R represents the'radical of any hydroxy aliphatic acid, as in the compound o n mnycooqn cn a tolf'lricinoleate. Q

. disclaim as [no part of my invention compositions of cellulose esters with benzyl esters of non-hydroxy aliphatic acid I claim: 7 I V .1. A composition: of matter comprising a cellulose ester anda benzyl ester of ay- 'droxy fatty acid.

sc o of my invention for use in 'con'unction w1 cellulose esters,are ill by the following type compounds.

Benzy ester of amlgdroxy, monocar' boxylic aliphatic acid, as

CH,.CH(OH).GQO.C,

benzyl-lacta. te. 1

l ester of a' hydroxy dicerboxylic v2. A composition of matter comprising nitrocellulose and a benzyl ester of a hydroxy fatty acid.

3. Acomposition of matter comprising a cellulose ester and a benzyl ester of a monohydroxy fatty acid.

4. A composition of matter comprising nitrocellulose and a benzyl ester of a hydroxy monocarboxylic aliphatic acid.-

5. A composition of matter comprising a cellulose ester and 'an aryl-alkyl ester of a hydroxy aliphatic acid.

6. A composition of matter comprising nitrocellulose and an aryl-alkyl ester of a hydroxy aliphatic acid.

7. A'composition of matter comprisin a cellulose ester and an aryl-alkyl ester ot a hydroxy monocarboxylic aliphatic acid.

8. A composition of matter comprising nitrocellulose and an aryl-alkyl ester of hydroxy monocarboxylic aliphatic acid.

9. A composition of matter comprising a cellulose ester and benzyl lactate.

10. A composition of matter comprising nitrocellulose and benzyl lactate.

11. A fluid composition of matter adapted for use as a lacquer containin a cellulose ester and a benzyl ester of a ydroxy ali-' phatic acid.

12. A fluid composition of matter adapted for use as a lacquer containin nitrocellulose and a benzyl ester of a hy roxy aliphatic acid.

13. A fluid composition of matter adapted for use as a lacquer containing a cellulose ester and benzyl lactate.

14. A fluid composition of matter adapted for use as a lacquer containing nitrocellulose and benzyl lactate.

15. A lacquer comprising 10 lbs. nitrocellulose, 5 lbs. shellac, and 5 lbs. benzyl lactate, dissolved in a solvent mixture containing 20 lbs. denatured ethyl alcohol, 20 lbs. ethyl acetate, 20 lbs. butyl alcohol, 20 lbs. butyl acetate, 10 lbs. toluol, with pigment to color as desired.

ture.

R. H. VAN SCHAACK, JR. 

